That is why John Abraham sells the brand on his shelves at Smoker's Heaven in Kansas City. He pulled other brands off the shelves because their ingredients weren't listed and customers started shying away from that product. "

You don't know what's in it!" he said.

41 Action News wanted to know what was in unlabeled products. In February, we put products from two different companies to the test and found traces of metal.

Safety is why KC Vapes, another local company, also makes their own e-cigarette liquid in a controlled, lab environment ahead of the FDA regulations.

Copyright 2014 Scripps Media, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.